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Are lasers safer with rechargeable batteries? (Patreon)

Published:
2021-06-26 17:48:00
Imported:
2026-06
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Content

Using an ND8 filter on different lasers in the divergence video, I felt like it really didn't lower the power 8 times as specified. To my eyes, the spots looked too bright.

So why not make a video on testing a neutral density filter?

During the filming, I noticed my Dilda laser seemed underpowered and suddenly my focus switched to testing batteries' effect on output power.

Will rechargeable 1.2V Ni-MH batteries lower the output from a cheap eBay laser pointer?

Find out in the video and comment with other suggestions on how to lower a laser beam's power. I'm ready to test (almost) anything in an upcoming video :)

Files

Previews only

Are lasers safer with rechargeable batteries?

I wonder what the best and easiest way to lower a laser's power output is? I have used an ND filter earlier, but it is not without issues. Could I simply switch to rechargeable batteries in stead of alkalines? They have 20% lower voltage after all. And how well does my ND filter work in reality? Like specified? I will also demonstrate how to test the strength of an unlabelled, mystery filter. ND8 filter donated earlier by https://www.wickedlasers.com for their show laser, like I use it in my video on divergence: https://youtu.be/GK8lzaFwUBg My Patreon-page: https://www.patreon.com/Brainiac75 Measuring my strongest lasers: https://youtu.be/c4RsQdyjgJE Measuring laser divergence: https://youtu.be/GK8lzaFwUBg Building my beam dump: https://youtu.be/rRIlhskMYAM Laser classes explained: https://youtu.be/dd6656CF1IY Did you miss one of my videos?: https://www.youtube.com/user/brainiac75/videos FULL MUSIC CREDITS Time codes: 0:01 + 8:20 "Darkness is Coming" Kevin MacLeod (incompetech.com) ISRC: USUAN1100584 (edited to be loopable by me) Time codes: 0:45 + 4:52 + 9:01 "Luminous Rain" Kevin MacLeod (incompetech.com) ISRC: USUAN1100169 Time code: 1:23 "Redletter" Kevin MacLeod (incompetech.com) ISRC: USUAN1100714 Time code: 1:50 "Clear Waters" Kevin MacLeod (incompetech.com) ISRC: USUAN1100290 Time codes: 3:24 + 7:49 "Darkening Developments" Kevin MacLeod (incompetech.com) ISRC: USUAN1100267 Time code: 5:26 "Neo Western" Kevin MacLeod (incompetech.com) ISRC: USUAN1100615 Time code: 6:30 "Perspectives" Kevin MacLeod (incompetech.com) ISRC: USUAN1300027 All music above licensed under Creative Commons: By Attribution 3.0 License http://creativecommons.org/licenses/by/3.0/ Time code: 7:05 Mix of two tracks: 1) The Shimmering by fran_ky (freesound.org/s/237363) Licensed under Creative Commons 0 license 2) "Spacial Harvest" Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 License http://creativecommons.org/licenses/by/3.0/ ISRC: USUAN1100653 #LowerPower #Laser #Brainiac75

Comments

Izzie

In my experience (at least using ND filters for video/photos), most filter manufacture's advertised ratings are basically arbitrary. Some are off by as much as 2/3rds of a stop - which is a significant difference!

Brainiac75
>>62607433

It seems weird they wouldn't get that parameter right. Getting the 'darkening' effect to affect all colors equally in a neutral way must be the hard one. Especially when it has to perfectly even all over the filter - both for neutrality and rating. But that crucial balance might affect the rating. Hitting the balance between neutrality and equality all over in every filter in a mass production - while still hitting the right rating - must be challenging. I will bet it is not easy to make a great ND filter without making it very expensive :)